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(No Model.) 3 Sheets-Sheet 1. W. F. BANKS. SIGNAL RECEIVING APPARATUS.

No. 587,693. Patented Aug. 10,1897.

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(No Model.) 3 Sheets-Sheet 2.

W. F. BANKS. SIGNAL RECEIVING APPARATUS.

WITNESSE INVE/VTUR A} ATTORNEY.

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SIGNAL RECEIVING APPARATUS. No. 587,693. Patented Aug. 10,1897.

WITNESSES: INVEN ran I fifew AL, ATTORNEYS.

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UNITED STATES PATENT OEEICE.

\VALTER F. BANKS, OF MILFORD, CONNECTICUT, ASSIGNOR TO THE NATIONALELECTRICAL MANUFACTURING COMPANY, OF SAME PLACE.

SIGNAL-RECEIVING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 587,693, dated August10, 1897.

Application filed October 1, 1896. Serial No. 607,548. (No model.)

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Be it known that 1, WALTER FREDERICK BANKS, a resident of Milford, NewHaven county, State of Connecticut, have invented certain new and usefulImprovements in Signal-Receiving Apparatus, of which the following is aspecification.

My invention relates to signal-receivin g apparatus, and has for itsobject to provide a receiving apparatus for different varieties orcharacters of signals. In the present instance I have shown an apparatusone part of which responds to all signals or impulses, the other partresponding only to special signals or impulses, the first part acting asa governing or controlling device for the second part.

To this end my invention consists in the construction hereinafter setforth and claimed.

My invention will be understood by referring to the accompanyingdrawings, in which Figure l is a front or face view of the apparatusembodying my invention. Fig. 2 is a rear view thereof. Fig. 3 is a sideelevation, and Fig. 4 is a detailview of part of the apparatushereinafter referred to.

In the drawings I have shown magnets i 2, mounted upon a plate Pivotedat the point i is a swinging pawl 5, provided with an arn'iature 50 andalso with a retractile spring ti and a back-stop 7. The lower end of thepawl 5 is bifurcated and provided in. the present. instance with detentsS S. The shaft 9 carries a pointer or indicator 10 and a ratchet 11,which ratchet is embraced between the ends of the bifurcated portion ofthe pawl 5 and acted upon by the detents S 8,which serve to release theratchet, forming an escapement therefor. The shaft 9 is provided with atoothed wheel 12,which meshes with a toothed segment 13,whicl1 ispivoted at 1% and raised by a spring 15,wl1ich is under tension. Thetoothed segment 13 is also provided with a pin 16,which projects througha slot 17 in the plate 3 and comes into the path of a restoring deviceconsisting of an arm 18 and lever 10, which are pivoted at 20 and movetogether and are provided with a lGlISlOlPSpllng 21, which restores themto their initial position, which is that shown in Fig. 2. It will beobvious, therefore, that impulses sent through the magnet 2 will serveto swing the pawl 5, which thereby acts as an escapement for the ratchet11,which, being fixed on the shaft 9, allows the shaft to be rotated bythe tensionspring 15, acting thereupon through the toothed segment 13and the toothed wheel 12. 22 23 are the controlling-contacts of a gongor other suitable device, which may be at a substation. As shown, thesecontacts are normally pressed together by an arm 2st, carried by theshaft 9, so that when the shaft 9 commences to revolve thecontact-spring 22 will be relieved of the pressure of the arm 24 andwill thereupon drop away from the companion contactspring 23, therebyallowing the apparatus at the substations to become operative. This isthe closedcircnit arrangement, the contacts being normally held closed.It is obvious that the device may be slightly modified to make it workon open circuit 0., the contact to be held normally open. The magnets l.l are provided with an ar mature 25, which is shown as working in a slot20 in the plate 3 and pivoted at 27, being carried upon arms Thearmature 25 is also provided with a contact piece- 29, which contactswith a plate 30 upon a swing ing insulated piece 31. This swinginginsulated piece is provided with a tension-spring 32, which holds it upto the contact-piece 2t). Mounted upon the plate 3 is a train of wheels,shown in the present instance as consisting of a scape-wheel 33, whichis provided with a pallet 34- and is mounted upon a shaft which alsocarries a toothed wheel 36, which is connected by a train of gearing 3738 with a ratchet-wheel 39, with which engage pawls it) 1-1, which arepivoted to the armature and provided with tension springs 42 4:3. Thearmature is also provided with a ten sionspring it. The plate 30 is inelectrical connection with a wire 45, which connects with a terminal T6.The course of the current through the device under certain conditions isas follows:

The current enters terminal A and passes, by means of the wire a, to andthrough the magnets 1 and returns to the point I), which is inelectrical connection with the plate 3. The current passes through theplate and through the arm 28 and contact 29 to the plate 30, wire 45,terminal 46, wire 47, and out by the terminal B. Under this condition ofthings it will be observed that the contact 29 touches the plate 30 andthe magnet 2 is short-circuited thereby. Under another condition,however, when the contact 20 is out of contact with the plate 30 thecurrent will enter at terminal A, pass through the wire a, magnet 1,plate 3, to the point e, thence through the magnet 2 to the terminalHaving described the construction, I will 110w describe in detail theoperation of my new receiver.

Ve will suppose a series of impulses to enter the instrument through theterminal A, with the parts in the position shown in Fig. 1. If now thisbe a series of short impulses, the magnet 1 will be saturated and willpull its armature toward it. The forward movement will be retarded byreason of the fact that as the armature moves forward the pawls engagewith the toothed wheel 30, which is, as explained, connected to aretarding device consisting in this instance of a train of gears and anescapement. 1f the current flow is only fora short period of time, thearmature will not have time during the pendency of the flow to move thecontact 29 off the plate 30, so that the short cireuit around the magnet2 will not be broken. If, however, the signal is sufficiently long, themagnet 1 will have time to draw its armature against the action of theretarding device far enough to move the contact 29 off the plate 30,when the short circuit will be broken and the signal will be indicatedby the magnet 2 swinging its armature to allow in this instance'apointer to rotate one step or tooth of the star-wheel. Thus it will beseen that although all signals passing through the magnet 1 will movethe armature, only the signals having a character or impulsesufficiently long will be effective to move the armature far enough tobreak the short circuit around the magnet 2. It will be thereforeobserved that the magnet 1 and its adj unctive mechanism constitute acontrolling device for the magnet 2 and its adjunctive mechanism, sothat one class or character of signals will be effective to operate themagnet 2 and allow it to announceits call in any suitable manner, whileanother class of signals will not actuate said magnet 2.

\Vhat 1 claim, and desire to secure by Letters Patent, is-

1. In a signal-receiving apparatus,the combination of a signal-receivingmagnet shortcircuited when the apparatus is at rest, a magnet forcontrolling the short circuit of the said receiving-magnet, and aretarding device for governing the action of the last-named magnet onthe contact, whereby certain signals only will be allowed to manifestthemselves in the receiving-magnet.

2. A signal-receiving device comprising the following instrumentalitiesin operative combination,to wit: anormallyshort-circuitedreceiving-magnet, an armature for controlling the said short circuit, amagnet for controlling the armature and a retarding device for governingthe movement of the armature.

3. A signalreceiving device comprising the following instrumentalitiesin operative combination, to wit: a receiving-magnet shortcircuited whenthe apparatus is at rest, an armature for controlling the said shortcircuit, a magnet for controllingthe armature, and a mechanicalretarding device for governing the movement of the armature.

4. A signal-receiving device comprising the following instrumentalitiesin operative con1- bination, to wit: a normally short-circuitedreceiving-magnet, an armature for controlling the said short circuit, amagnet for controlling the armature, and a train of gears for retardingthe movement of the armature.

5. A signal-receiving device comprising a magnet short-circuited whenthe apparatus is at rest, a plurality of contacts controlling the saidshort circuit, an armature controlling the contacts, a magnetcontrolling the armature, and a retarding device with which the armatureis engaged upon its forward movement and disengaged upon its backwardmovement, substantially as set forth.

\VA'L'IER F. BANKS.

Witnesses:

Gno. E. Monsn, MAUPICE Brook.

